Add tarball site to packstack jobs.

This is required for tarball related jobs in python-jobs.

Change-Id: If8c33556a0f93ff69674b3cfc69ead091c7f2aff
Reviewed-on: https://review.openstack.org/19866
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins

modules/openstack_project/files/jenkins_job_builder/config/projects.yaml

@@ -473,6 +473,16 @@
       - pypi-jobs
 
 
+- project:
+    name: packstack
+    github-org: stackforge
+    node: precise
+    tarball-site: tarballs.openstack.org
+
+    jobs:
+      - python-jobs
+
+
 - project:
     name: python-monikerclient
     github-org: stackforge
@@ -578,12 +588,3 @@
     provider: hpcloud-az2
     jobs:
       - devstack-node-provider-jobs
-
-
-- project:
-    name: packstack
-    github-org: stackforge
-    node: precise
-
-    jobs:
-      - python-jobs